Comparison of predictions for the relation of mean stellar mass at given black hole mass  ⟨ s ⟩ (μ) with the data from Merloni et al. (2010). The blue circles show their data, the red triangles give their mean stellar masses in black hole mass bins. These are compared with predictions of  ⟨ s ⟩ (μ) using our model 2. We employ the case of no evolution in the M_•-M_Bulgerelation and an intrinsic scatter of σ = 0.3 (solid line), evolution in this relation with gamma = 1 (dashed line) and for a higher intrinsic scatter of 0.5 dex but no evolution in the relation (dotted line). The black dashed line again indicates the true M_•-M_Bulgerelation.